All of that said I bought my bike in March (first road bike) and have completely stripped and rebuilt it (with the exception of the motor), lots of elbow grease, but it was missing a lot of standard bits (tank rubbers, proper radiator rubbers and collars, bar grips etc etc) I did manage to source quite a bit second hand but others I needed to buy new and even my approach has added up to quite a bit. Besides the fact that I decided not to add it all up (dont really want to know the number) I am okay with it because I plan on having the bike for a long time (I have owned my 1970 Alfa for 15 years now, and I have a 20 year old mountain bike

So I think you need to make a properly researched decision before you set out otherwise you are bound to lose interest or money